The rest of the school day is uneventful

When you get home, you can't believe what you've been through.

"Jacklyn!" you screamed. "How could you do this to me?"

"Mom's the one who gave us the power," said Jacklyn. "Go yell at her."

You rushed downstairs and found your mom sitting at the dining room table.

"Mom, why are you forcing me to do things?" you asked.

"I'm not forcing anyone," she said. "I'm simply allowing your friends to make sure you act like the girl you are. You can control yourself once you stop misbehaving."

"I'll do everything except date boys," you said. "I'm still a lesbian."

"You seemed to enjoy lunch with Jared today," she said.

"That wasn't my choice," you said. "I was **** to go."

"But you liked it," she said.

"No I didn't," you said.

You felt the strange sense again.

"I mean, I loved it of course," you said. "Boys are so cute I want to date them all."

"Of course honey," she said. "Now get upstairs and go work on your homework."

"I don't have homework on the first day of school," you said.

"Then go talk to your sister," she said.

Despite wanting to stay downstairs, you walked up to your room and sat down on your bed across from Jacklyn. You scrolled through your phone for awhile, and then you started getting horny, so you got up to walk to the bathroom.

"Where are you going?" she asked.

"Downstairs," you said.

You opened the bathroom door and walked in. Two seconds later Jacklyn came in too.

"That's not downstairs," she said. "Don't try to use the bathroom without me."

You sighed.

"But I wasn't going to use the bathroom, I was just going to-"

"To what?" she asked.

You closed your lips.

"To masturbate?" she asked. "Go ahead. I'll watch."

Losing control of yourself once more, you sat down on the toilet and started masturbating in front of your sister. She got undressed too, and then put her panties in your hand.

"Sniff my panties until you orgasm," she said.

Unable to refuse her command, you masturbated to the smell of your own sister's vagina. All you could think about was her, with the smell and her naked body a few feet in front of you. As you were nearing orgasm Jacklyn put your panties on your vagina. Finally, you felt an orgasm, and your legs spread wide open wildly. You weren't able to stop moaning for over a minute.

That's when Jacklyn took your panties, which were now covered in your cum, and put them up against your nose.

"Jacklyn, what are you doing?" you asked.

"Sniff them," she demanded.

You started sniffing your own panties, and it oddly turned you on. The smell of your own vagina was just as good as your sister's, if not better. You started getting wet again, but then Jacklyn told you to put them down and stop masturbating.

The door opened and Becky, Liz, and Celia walked in. All of them took of their clothes right away.

"And, now," said Becky, doing something to you.

You felt your boobs growing, until they were clearly a size bigger. Your legs felt suddenly more sensitive and you couldn't keep them together. You started to feel a tinge of warmth in your vagina, which began to leak with cum.

"What did you just do?" you asked. Your voice was squeaky and unusually high pitched.

"I just gave you your first period, well the way I'd make them if it was up to me," said Becky. "Basically you'll be super horny and sensitive for six days every twenty-eight days. Your boobs, vagina, butt, legs, and feet will be extra sensitive too, so you can't wear a bra, panties, socks, or a skirt that reaches more than halfway to your knee. If you are a bad girl, we'll make your period come early or last longer, if you're good it might end early."

You stood up and looked in the mirror. Maybe it was just the angle, but your whole body seemed super curvy. Your lips were bigger and very pouty looking.

"Like every other girl does during her period, you're going to have to wear pads or tampons to stop all that cum from leaking out. Your legs are already covered with it," said Jacklyn. "The ones in my drawer are ours to share from now on."

"Sleepover at my house tonight," said Becky. "Bring lots of clothes, we'll be dressing up."

The three of them put their clothes back on and walked out of the room. You and Jacklyn went back into your room and Jacklyn put a tampon over your vagina. You felt immediate relief as the cum stopped dripping.

A few hours later, just before dinner, Jacklyn sat down next to you on your bed.

"I need to pee," she said.

You took a hint and followed her into the bathroom. She took your tampon off and threw it away. Then she sat down across from you on the toilet.

"You go first," she said.

"But I don't need to pee," you said.

"Then you'll sit here until you do," she said. She got you a glass of water to drink, then sat down with you again.

"Start masturbating," she said. You did what you were told.

As you moved your finger around in your vagina, she leaned in towards you and kissed you.

"Jacklyn!" you said. "But we're sisters!"

"Shut up and admit you like me," she said.

"Jacklyn, I love you," you said. "I think you're the cutest girl in the world."

She smiled.

"Why'd you make me say that?" you asked.

"You said it on your own," she said.

You ignored her and kept masturbating.

"Picture boys naked, and keep masturbating until you orgasm," she said.

Suddenly images flashed before your eyes. You imagined having a cock slam into your vagina, sucking on one like a lollipop, and boys walking around naked. Despite your best efforts, the only thing you could think about was boys. You replayed parts of you and Jared's conversation, thinking about how sexy he was. At last, you orgasmed to the thought of Jared naked.

"I'm not gay, you jerk!" you yelled.

"You're bisexual now," she said. "You like boys and girls equally."

You didn't say a word to Jacklyn for the next two hours, until you left for the sleepover.

"Girls share a bed at sleepovers," said Jacklyn.

"Hmm," you said.

You knocked on the door and Becky let you in. Everyone else was already there.

"Mom!" called Becky.

"Yes, honey?" asked a woman who looked like a taller 40-year-old version of Becky.

"This is Courtney, Jacklyn's sister," said Becky.

"Hello," said Becky's mom.

"Oh, and mom," said Becky. "She had her first period today."

Becky's mom smiled.

"Congratulations, honey," she said. Then she frowned. "Don't be embarrassed. Honey! Now I want to hear you say out loud that you had your first period today. No buts."

"I had my first period today," you said.

"Louder," she said.

"I had my first period today!" you yelled.

"Good girl," she said. "Now, I hope you have a fun night. If you need anything, call me in here."

Becky's mom left the living room, and the other girls sat down on the two couches, giggling.